Sadiron



Dec. 4 1923. v

H. C. DOWNEY SADIRON Filed Jan. 5 1922 Patented Dee 4, i923..v

rrao stares i macs? i HARRY o. n oWNEY, or SPRINGFIELD, oHro.

sADInoN.

Application filed January 3,' 1922. `serial No; 526,657.

To all whom t may concern Be it known that I, HARRY C. DOWNEY, a citizen of the United States, residing at Springfield, in the county of Clark and State of Ohio, have invented certain new and useful Improvements in Sadirons, of which the following is a specification.

My invention relates to improvements in sad irons of the self-heating type, and particularly of the kind which are heated by apparatus employing liquid fuel incorporated as a part of the iron structure The object of my invention is to improve the heating apparatus t0 secure a more perfeet combustion of the fuel; a more specific object being to improve the generating portions of the apparatus to thereby obtain an efficient vaporization of the liquid fuel.

Further objects will appear from the accompanying description and claims.

In the accompanying drawings Fig. 1 is a longitudinal section of a device embodying my improvements.

Fig. 2 is a longitudinal section of the heating apparatus.

Referring to the drawings, 1 represents the main body portionI of iron, formed with an inner chamber and" having a cover 2, removably secured thereto in any well known way; the cover having the usual handle 3. A member 4, similar in most respects to that shown in Letters Patent No. 996,942 dated July 4, 1911, is inserted in an opening in the rear wall of the body 1, this member having side grooves 4a engaged by the side walls of the opening in a manner explained in said patent. This member 4 has communicating passages 5 and 6 controlled by the valve 7 and' the lower end o-f the passage 6 has leading therefroma small jet openingS, spaced from the open end of a burner tube 9,supported by the apron 10 on the member 4 substantially `as shown in the prior patent.

In the present case, the forward end of the member 4 has an exteriorly threaded boss 4b upon which is threaded the rear end of a tube 11, which extends along the upper side of the burner tube in close proximity thereto. The forward rend of the tube 11 has threaded therein the rear endof a supply v tube 12 which is supported by the forward wall of the body 1 and carries a fuel tank 13, constructed in the manner sho-wn in the l prior patent referred to in that it has a nipple 14, the upper end of which is closed by a cap 15, the nipple extending into the tank lfor the. purposes explained in said patents.

A difficulty" heretofore'met withv in Vdevices of the character has been the lack of proper combustion, which not only causes a disagreeable odor but also insufficient heating capacity for ironing purposes, this trouble being due'to the fact that thearea of the'Y generating parts of the apparatus were too restricted to at all times vaporize the liquid fuel to the proper degree necessary for good results.` In my improved structure it will be noticed that the interior diameter of the tube 11 is of considerably-greater dimension, substantially three times greater, than that supply tube 12 and that of the passages 5 and 6 which supply tube and passages are of the usual and proper dimensions found in.

devices of this character, and that this tube is located immediately above the burner, as a result of which the liquid is generated more Vrapidly and in suflicient quantity to furnish ample vgas in a highly vvaporized condition to provide a good combustible mixture to the burner. By having the supply tube 12 of comparatively small dimensions as com pared with the generator tube, undue back pressure 'sufficient to endanger the tank is prevented. As clearly shown in Fig. 2 the relative proportion o-f the diameter ofthe tube 11 and the supply tube 12 is an important feature of the invention and should be l at least in the ratio'of three to one, thatis to say, the supplementary -chamber ortube 11 should be at least three times larger in diameter Vthan Vthe supply tube 12. In pracK tice it has been found that. this chamber can Y even be made relatively larger in' diameter than the foregoing portions,'but Vif reduced to the ratio of anything approaching the .1' Y

same .size as the supply tube 12 the vdevicev will not operate properly.

This arrangement has been foundinv practice t0 lbe mosteiiiclent, as itis possible and is the practice by this method to alter the heating apparatus of old irons returned because of ineflicient service, so as to convert Y Y them into etliciently working devices with no other changeA than the Vinstallationof the improved form l of generator` described.

Thel arrangement also acts as a trapto` arrest particles of foreign matter to prel vent clogging of the jet, these foreign partil cles settling on the bottom of the generator fio tube; it being observed that the bottom of the tube is below the outlet therefrom.

It has been further found in practice that a more uniform pressure'of gaseous vapor is secured than in the old devices, thus maintaining a flame of uniforinintensity.

Having thus described my invention, I claim Y In a device of the character described, the combination of a main body portion having a chamber, a member supported at one end of said chamber'having a horizontal passageway and a connecting vertical passage-V Way, a jet formed near theend of thev verti-A HARRY C. DOWNEY. 

